Analysis Tasks – AutoTire

Three types of events are supported for the Tire Test Rig:

1. Lateral Slip
2. Longitudinal Slip
3. Vertical Load

These can be added to the model from the Task Wizard:

Figure 1. Events for Tire Testing

The tire lateral slip test has the following set-up:

• The tire travels at a constant longitudinal velocity. The Rig body has an initial velocity, which is maintained by an imposed motion. You can edit this velocity in the forms available in the event.
• The tire rolls freely on the road.
• Two load cases are run sequentially:
  • Different vertical loads – with slip angle sweep
  • Different camber angles – with slip angle sweep
• You can add as many vertical load values and camber angle values for the two cases by editing the appropriate load case tables in the Analysis System Forms.

  
  
  Figure 2. Lateral Slip Test: Set up Forms

The test is set up as below:

• The tire travels at an initial longitudinal velocity.
• After steady state, slip is induced by the imposed motion on the tire hub.
  • The motion on the hub is sinusoidally increased and decreased by the Longitudinal Slip Amplitude value specified.
  • The test is run for different vertical loads.
• You may add as many vertical load values as needed using the Forms.

  
  
  Figure 3. Longitudinal Slip Test: Set up Forms

The test set up is:

• The tire travels at a constant longitudinal velocity.
• The tire rolls freely on the road.
• A specified vertical load is applied and released in a cycle.

  
  
  Figure 4. Vertical Load Test: Set up Form